<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <form action="saveuser" method="post">
        姓名:<input name="userName" value="zhangsan"><br>
        年龄:<input name="age" value="18"><br>
        生日:<input name="birth" value="2009/12/10"><br>
        宠物 :<input name="pet" value="tom,3"><br>

        <input type="submit" value="提交">
    </form>
</body>
</html>